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One of the most important reactions in the fixation of nitrogen for agriculture is known as the Haber Process for making ammonia shown below. (
One of the most important reactions in the fixation of nitrogen for agriculture is known as the Haber Process for making ammonia shown below.
a Balance to chemical equation.
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b Calculate the standard enthalpy of reaction at for the assigned stoichiometry.
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c Calculate the Standard Gibbs energy of reaction at for the assigned stoichiometry.
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Be careful that the units on the Gibbs energy or reaction match with units on
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e Calculate at using the shortcut van't Hoff equation.
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f Enter the equation for the equilibrium constant using partial pressures of the components in algebraic form. The variables you should use are pNH pH pN are the partial
pressures of respectively.
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g Enter the equation for the equilibrium constant using total pressure and mole fractions. The variables you should use are for the mole fractions of
respectively and the total pressure,
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h Assuming that the moles fed into the reactor are of nitrogen and of hydrogen develop an algebraic equation for the total number of moles at reaction equilibrium using the
reaction coordinate. Use E for the reaction coordinate.
Total moles
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i Now develop an algebraic equation for the mole fraction of at equilibrium. Use for the reaction coordinate.
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j Develop an algebraic equation for the mole fraction of at equilibrium. Use for the reaction coordinate.
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